EP 0126686 B1 19880817 - OPTICAL WAVEGUIDE EMPLOYING A DIFFRACTION GRATING
Title (en)
OPTICAL WAVEGUIDE EMPLOYING A DIFFRACTION GRATING
Publication
Application
Priority
FR 8308298 A 19830519
Abstract (en)
[origin: US4747654A] Optical guidance structure comprising a monomode input guide having a particular direction (De), two monomode output guides having directions (Ds1, Ds2) symmetrically inclined with respect to the direction (De) of the input guide and a widened junction zone between the input guide and the output guides. A diffraction grating is located between the input guide and the junction. The grating has a spacing which defines only two diffraction directions of orders differing from zero, respectively +1 and -1. The spacing is chosen so that these two diffraction directions coincide with the directions of the first two output guides.
IPC 1-7
IPC 8 full level
G02B 6/122 (2006.01); G02B 6/124 (2006.01); G02B 6/134 (2006.01); G02B 6/28 (2006.01); G02F 1/295 (2006.01); G02F 1/335 (2006.01)
CPC (source: EP US)
G02B 6/124 (2013.01 - EP US); G02B 6/1345 (2013.01 - EP US); G02B 6/2848 (2013.01 - EP US); G02F 1/2955 (2013.01 - EP US)
Designated contracting state (EPC)
DE GB NL SE
DOCDB simple family (publication)
EP 0126686 A1 19841128; EP 0126686 B1 19880817; DE 3473514 D1 19880922; FR 2546309 A1 19841123; FR 2546309 B1 19860704; JP S59220705 A 19841212; US 4747654 A 19880531
DOCDB simple family (application)
EP 84400985 A 19840515; DE 3473514 T 19840515; FR 8308298 A 19830519; JP 10035684 A 19840518; US 4516287 A 19870504